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fs: fold __generic_write_end back into generic_write_end 

This effectively reverts a6d639da63 ("fs: factor out a
__generic_write_end helper") as we now open code what is left of that
helper in iomap.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2019-06-27 17:28:40 -07:00 committed by Darrick J. Wong
parent 8d3e72a180
commit 8af54f291e
2 changed files with 29 additions and 35 deletions
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62
fs/buffer.c
View File

@ -2086,38 +2086,6 @@ int block_write_begin(struct address_space *mapping, loff_t pos, unsigned len,
} }
EXPORT_SYMBOL(block_write_begin); EXPORT_SYMBOL(block_write_begin);
void __generic_write_end(struct inode *inode, loff_t pos, unsigned copied,
struct page *page)
{
loff_t old_size = inode->i_size;
bool i_size_changed = false;
/*
* No need to use i_size_read() here, the i_size cannot change under us
* because we hold i_rwsem.
*
* But it's important to update i_size while still holding page lock:
* page writeout could otherwise come in and zero beyond i_size.
*/
if (pos + copied > inode->i_size) {
i_size_write(inode, pos + copied);
i_size_changed = true;
}
unlock_page(page);
if (old_size < pos)
pagecache_isize_extended(inode, old_size, pos);
/*
* Don't mark the inode dirty under page lock. First, it unnecessarily
* makes the holding time of page lock longer. Second, it forces lock
* ordering of page lock and transaction start for journaling
* filesystems.
*/
if (i_size_changed)
mark_inode_dirty(inode);
}
int block_write_end(struct file *file, struct address_space *mapping, int block_write_end(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied, loff_t pos, unsigned len, unsigned copied,
struct page *page, void *fsdata) struct page *page, void *fsdata)
@ -2158,9 +2126,37 @@ int generic_write_end(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied, loff_t pos, unsigned len, unsigned copied,
struct page *page, void *fsdata) struct page *page, void *fsdata)
{ {
struct inode *inode = mapping->host;
loff_t old_size = inode->i_size;
bool i_size_changed = false;
copied = block_write_end(file, mapping, pos, len, copied, page, fsdata); copied = block_write_end(file, mapping, pos, len, copied, page, fsdata);
__generic_write_end(mapping->host, pos, copied, page);
/*
* No need to use i_size_read() here, the i_size cannot change under us
* because we hold i_rwsem.
*
* But it's important to update i_size while still holding page lock:
* page writeout could otherwise come in and zero beyond i_size.
*/
if (pos + copied > inode->i_size) {
i_size_write(inode, pos + copied);
i_size_changed = true;
}
unlock_page(page);
put_page(page); put_page(page);
if (old_size < pos)
pagecache_isize_extended(inode, old_size, pos);
/*
* Don't mark the inode dirty under page lock. First, it unnecessarily
* makes the holding time of page lock longer. Second, it forces lock
* ordering of page lock and transaction start for journaling
* filesystems.
*/
if (i_size_changed)
mark_inode_dirty(inode);
return copied; return copied;
} }
EXPORT_SYMBOL(generic_write_end); EXPORT_SYMBOL(generic_write_end);

2
fs/internal.h
View File

@ -40,8 +40,6 @@ static inline int __sync_blockdev(struct block_device *bdev, int wait)
extern void guard_bio_eod(int rw, struct bio *bio); extern void guard_bio_eod(int rw, struct bio *bio);
extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len, extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
get_block_t *get_block, struct iomap *iomap); get_block_t *get_block, struct iomap *iomap);
void __generic_write_end(struct inode *inode, loff_t pos, unsigned copied,
struct page *page);
/* /*
* char_dev.c * char_dev.c